Calculating Total Cost. Multiply the cost of an item or service by the sales tax in order to find out the total cost. The equation looks like this: Item or service cost x sales tax (in decimal form) = total sales tax. Add the total sales tax to the Item or service cost to get your total cost. Multiply retail price by tax rate
Let's say you're buying a $100 item with a sales tax of 5%. Your math would be simply: [cost of the item] x [percentage as a decimal] = [sales tax]. That's $100 x .
Divide by 6 on both sides to have the variable by itself. the answer is 8.
$15 is the original purchase. $12 and hour.
15+12y
Answer:
p=2l+2w
p=2*9 +2*4
18+8
p=26
Step-by-step explanation:
idk if this is right but that's what i got
Answer:
the cost of the table is
the cost of the chair is 
Step-by-step explanation:
Let
x-----> the cost of the table
y----> the cost of the chair
we know that
-----> equation A
-----> equation B
substitute equation B in equation A





Find the value of x
---->